Question about 1994 Cadillac Seville

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Idle surge 1994 cadillac seville

The engine idle goes up and down all by itself ,can be a problem at red lites an stop signs

Posted by katim on

  • wendell ybarra Nov 20, 2008

    it idles hi then low then dies at stop lights or cuts out when i drive around 35 to 40 mph

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blackrhinose

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Have a 1994 Cadi Seville has idle problems when I stop, Does anyone know where are the air sensors

Posted on Aug 17, 2011

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Anonymous

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I have the same problem i found out that it is my cruis control has a leak in the hose and if you just disconect it you will no longer have cruis control but it should stop the problem

Posted on Mar 03, 2009

  • marianne papple
    marianne papple Feb 19, 2014

    i disconnected the cruise control still surges & stalls at lights etc

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My 1994 buick regal gran sport jumps a lot when at a stop sign or red light, but when i accelerate the problem goes away. also when in park my RPM's drops extremely low and it sounds as if its goi


This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve. Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control

Aug 23, 2012 | Buick Cars & Trucks

5 Answers

Engine shuts down, always at low speeds or at stop signs and lights


they all are wrong .i was a service tech for Cadillac for 15 year and guarantee you that the problem is in you're crank shaft sensor .Cadillac redesign the sensor on 2002.check for code you'll find p0355 and p0385 .replace the sensor and reprogram the new ones.good luck Danny.B

Aug 06, 2010 | 2001 Cadillac DeVille

1 Answer

Hesitation problem


try cleaning the inside of the MAF sensor and do the following procedure as well.
Here is the most common cause of surges and stalls at stops and low erratic idle speed and rough idle, it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

Mar 24, 2009 | 1994 Cadillac Fleetwood

1 Answer

1994 cadillac eldorado.will not idle.stalls out when stopping.when in part idles up and down


Sounds like a bad TPS or Idle Speed motor. You need to Scan it for codes. Cadilliac has on board diagnostics. Hold down the (off) and (warmer) buttons on the temp control until it goes into diagnosis mode. Then it will give you the codes right on the dash. Turn the key off to exit diagnosis mode after you write down the codes. Then google the codes.

Mar 06, 2009 | 1994 Cadillac Eldorado

1 Answer

When i stop at a red lite or put it park my engine idles up high


Check your Idle Air Control Valve (IAC) to see if it's working ok, and set your idle hard stop.

Feb 02, 2009 | 1994 Ford F150 Styleside Supercab

1 Answer

1994 cadillac seville sls, won't idol


Sir, I think my first thought would be your Idle Air Control, It would be best to know if your check engine light is on and what code it is throwing. If you do not know how to get the code I can help you with that too but I will have to do some research, most these used the climate control to access the codes. I may be wrong about that but I know I have used that display before for diagnostics, it may have been only the ac diagnostics. A quick search on google for something like " how to read diagnostic engine codes 1994 cadillac sevile should return you with the information. Most other gm autos you just ground the diagnostic terminal and watch check flash the code to you a code 12 is normal.

Dec 12, 2008 | 1994 Cadillac Seville

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